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2d57a95f DM |
1 | /* |
2 | * Generic ULPI USB transceiver support | |
3 | * | |
4 | * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de> | |
5 | * | |
6 | * Based on sources from | |
7 | * | |
8 | * Sascha Hauer <s.hauer@pengutronix.de> | |
9 | * Freescale Semiconductors | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
f940fcd8 | 28 | #include <linux/export.h> |
2d57a95f DM |
29 | #include <linux/usb.h> |
30 | #include <linux/usb/otg.h> | |
31 | #include <linux/usb/ulpi.h> | |
32 | ||
96b9e832 IG |
33 | |
34 | struct ulpi_info { | |
35 | unsigned int id; | |
36 | char *name; | |
37 | }; | |
38 | ||
2d57a95f | 39 | #define ULPI_ID(vendor, product) (((vendor) << 16) | (product)) |
96b9e832 IG |
40 | #define ULPI_INFO(_id, _name) \ |
41 | { \ | |
42 | .id = (_id), \ | |
43 | .name = (_name), \ | |
44 | } | |
2d57a95f | 45 | |
2d57a95f | 46 | /* ULPI hardcoded IDs, used for probing */ |
96b9e832 IG |
47 | static struct ulpi_info ulpi_ids[] = { |
48 | ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"), | |
1e4cba8b | 49 | ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"), |
ead5178b MS |
50 | ULPI_INFO(ULPI_ID(0x0424, 0x0007), "SMSC USB3320"), |
51 | ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"), | |
2d57a95f DM |
52 | }; |
53 | ||
298b083c | 54 | static int ulpi_set_otg_flags(struct usb_phy *phy) |
2d57a95f | 55 | { |
13dd0c97 IG |
56 | unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN | |
57 | ULPI_OTG_CTRL_DM_PULLDOWN; | |
2d57a95f | 58 | |
298b083c | 59 | if (phy->flags & ULPI_OTG_ID_PULLUP) |
fc567f06 | 60 | flags |= ULPI_OTG_CTRL_ID_PULLUP; |
2d57a95f | 61 | |
13dd0c97 IG |
62 | /* |
63 | * ULPI Specification rev.1.1 default | |
64 | * for Dp/DmPulldown is enabled. | |
65 | */ | |
298b083c | 66 | if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS) |
13dd0c97 | 67 | flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN; |
2d57a95f | 68 | |
298b083c | 69 | if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS) |
13dd0c97 | 70 | flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN; |
2d57a95f | 71 | |
298b083c | 72 | if (phy->flags & ULPI_OTG_EXTVBUSIND) |
fc567f06 | 73 | flags |= ULPI_OTG_CTRL_EXTVBUSIND; |
2d57a95f | 74 | |
298b083c | 75 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
76 | } |
77 | ||
298b083c | 78 | static int ulpi_set_fc_flags(struct usb_phy *phy) |
13dd0c97 IG |
79 | { |
80 | unsigned int flags = 0; | |
81 | ||
82 | /* | |
83 | * ULPI Specification rev.1.1 default | |
84 | * for XcvrSelect is Full Speed. | |
85 | */ | |
298b083c | 86 | if (phy->flags & ULPI_FC_HS) |
13dd0c97 | 87 | flags |= ULPI_FUNC_CTRL_HIGH_SPEED; |
298b083c | 88 | else if (phy->flags & ULPI_FC_LS) |
13dd0c97 | 89 | flags |= ULPI_FUNC_CTRL_LOW_SPEED; |
298b083c | 90 | else if (phy->flags & ULPI_FC_FS4LS) |
13dd0c97 IG |
91 | flags |= ULPI_FUNC_CTRL_FS4LS; |
92 | else | |
93 | flags |= ULPI_FUNC_CTRL_FULL_SPEED; | |
94 | ||
298b083c | 95 | if (phy->flags & ULPI_FC_TERMSEL) |
13dd0c97 IG |
96 | flags |= ULPI_FUNC_CTRL_TERMSELECT; |
97 | ||
98 | /* | |
99 | * ULPI Specification rev.1.1 default | |
100 | * for OpMode is Normal Operation. | |
101 | */ | |
298b083c | 102 | if (phy->flags & ULPI_FC_OP_NODRV) |
13dd0c97 | 103 | flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; |
298b083c | 104 | else if (phy->flags & ULPI_FC_OP_DIS_NRZI) |
13dd0c97 | 105 | flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI; |
298b083c | 106 | else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP) |
13dd0c97 IG |
107 | flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP; |
108 | else | |
109 | flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL; | |
110 | ||
111 | /* | |
112 | * ULPI Specification rev.1.1 default | |
113 | * for SuspendM is Powered. | |
114 | */ | |
115 | flags |= ULPI_FUNC_CTRL_SUSPENDM; | |
116 | ||
298b083c | 117 | return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL); |
13dd0c97 IG |
118 | } |
119 | ||
298b083c | 120 | static int ulpi_set_ic_flags(struct usb_phy *phy) |
13dd0c97 IG |
121 | { |
122 | unsigned int flags = 0; | |
123 | ||
298b083c | 124 | if (phy->flags & ULPI_IC_AUTORESUME) |
13dd0c97 IG |
125 | flags |= ULPI_IFC_CTRL_AUTORESUME; |
126 | ||
298b083c | 127 | if (phy->flags & ULPI_IC_EXTVBUS_INDINV) |
13dd0c97 IG |
128 | flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS; |
129 | ||
298b083c | 130 | if (phy->flags & ULPI_IC_IND_PASSTHRU) |
13dd0c97 IG |
131 | flags |= ULPI_IFC_CTRL_PASSTHRU; |
132 | ||
298b083c | 133 | if (phy->flags & ULPI_IC_PROTECT_DIS) |
13dd0c97 IG |
134 | flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE; |
135 | ||
298b083c | 136 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
137 | } |
138 | ||
298b083c | 139 | static int ulpi_set_flags(struct usb_phy *phy) |
13dd0c97 IG |
140 | { |
141 | int ret; | |
142 | ||
298b083c | 143 | ret = ulpi_set_otg_flags(phy); |
13dd0c97 IG |
144 | if (ret) |
145 | return ret; | |
146 | ||
298b083c | 147 | ret = ulpi_set_ic_flags(phy); |
13dd0c97 IG |
148 | if (ret) |
149 | return ret; | |
150 | ||
298b083c | 151 | return ulpi_set_fc_flags(phy); |
13dd0c97 IG |
152 | } |
153 | ||
298b083c | 154 | static int ulpi_check_integrity(struct usb_phy *phy) |
a9138192 IG |
155 | { |
156 | int ret, i; | |
157 | unsigned int val = 0x55; | |
158 | ||
159 | for (i = 0; i < 2; i++) { | |
298b083c | 160 | ret = usb_phy_io_write(phy, val, ULPI_SCRATCH); |
a9138192 IG |
161 | if (ret < 0) |
162 | return ret; | |
163 | ||
298b083c | 164 | ret = usb_phy_io_read(phy, ULPI_SCRATCH); |
a9138192 IG |
165 | if (ret < 0) |
166 | return ret; | |
167 | ||
168 | if (ret != val) { | |
169 | pr_err("ULPI integrity check: failed!"); | |
170 | return -ENODEV; | |
171 | } | |
172 | val = val << 1; | |
173 | } | |
174 | ||
175 | pr_info("ULPI integrity check: passed.\n"); | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
298b083c | 180 | static int ulpi_init(struct usb_phy *phy) |
2d57a95f | 181 | { |
7b4a0367 WS |
182 | int i, vid, pid, ret; |
183 | u32 ulpi_id = 0; | |
2d57a95f | 184 | |
7b4a0367 | 185 | for (i = 0; i < 4; i++) { |
298b083c | 186 | ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i); |
7b4a0367 WS |
187 | if (ret < 0) |
188 | return ret; | |
189 | ulpi_id = (ulpi_id << 8) | ret; | |
190 | } | |
191 | vid = ulpi_id & 0xffff; | |
192 | pid = ulpi_id >> 16; | |
2d57a95f DM |
193 | |
194 | pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid); | |
195 | ||
96b9e832 IG |
196 | for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) { |
197 | if (ulpi_ids[i].id == ULPI_ID(vid, pid)) { | |
198 | pr_info("Found %s ULPI transceiver.\n", | |
199 | ulpi_ids[i].name); | |
a9138192 | 200 | break; |
96b9e832 IG |
201 | } |
202 | } | |
a9138192 | 203 | |
298b083c | 204 | ret = ulpi_check_integrity(phy); |
a9138192 IG |
205 | if (ret) |
206 | return ret; | |
2d57a95f | 207 | |
298b083c | 208 | return ulpi_set_flags(phy); |
2d57a95f DM |
209 | } |
210 | ||
298b083c | 211 | static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host) |
13dd0c97 | 212 | { |
298b083c HK |
213 | struct usb_phy *phy = otg->phy; |
214 | unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL); | |
13dd0c97 IG |
215 | |
216 | if (!host) { | |
217 | otg->host = NULL; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | otg->host = host; | |
222 | ||
223 | flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE | | |
224 | ULPI_IFC_CTRL_3_PIN_SERIAL_MODE | | |
225 | ULPI_IFC_CTRL_CARKITMODE); | |
226 | ||
298b083c | 227 | if (phy->flags & ULPI_IC_6PIN_SERIAL) |
13dd0c97 | 228 | flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE; |
298b083c | 229 | else if (phy->flags & ULPI_IC_3PIN_SERIAL) |
13dd0c97 | 230 | flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE; |
298b083c | 231 | else if (phy->flags & ULPI_IC_CARKIT) |
13dd0c97 IG |
232 | flags |= ULPI_IFC_CTRL_CARKITMODE; |
233 | ||
298b083c | 234 | return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); |
13dd0c97 IG |
235 | } |
236 | ||
298b083c | 237 | static int ulpi_set_vbus(struct usb_otg *otg, bool on) |
2d57a95f | 238 | { |
298b083c HK |
239 | struct usb_phy *phy = otg->phy; |
240 | unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL); | |
2d57a95f | 241 | |
fc567f06 | 242 | flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT); |
2d57a95f DM |
243 | |
244 | if (on) { | |
298b083c | 245 | if (phy->flags & ULPI_OTG_DRVVBUS) |
fc567f06 | 246 | flags |= ULPI_OTG_CTRL_DRVVBUS; |
2d57a95f | 247 | |
298b083c | 248 | if (phy->flags & ULPI_OTG_DRVVBUS_EXT) |
fc567f06 | 249 | flags |= ULPI_OTG_CTRL_DRVVBUS_EXT; |
2d57a95f DM |
250 | } |
251 | ||
298b083c | 252 | return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); |
2d57a95f DM |
253 | } |
254 | ||
86753811 | 255 | struct usb_phy * |
298b083c | 256 | otg_ulpi_create(struct usb_phy_io_ops *ops, |
2d57a95f DM |
257 | unsigned int flags) |
258 | { | |
298b083c HK |
259 | struct usb_phy *phy; |
260 | struct usb_otg *otg; | |
261 | ||
262 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
263 | if (!phy) | |
264 | return NULL; | |
2d57a95f DM |
265 | |
266 | otg = kzalloc(sizeof(*otg), GFP_KERNEL); | |
298b083c HK |
267 | if (!otg) { |
268 | kfree(phy); | |
2d57a95f | 269 | return NULL; |
298b083c HK |
270 | } |
271 | ||
272 | phy->label = "ULPI"; | |
273 | phy->flags = flags; | |
274 | phy->io_ops = ops; | |
275 | phy->otg = otg; | |
276 | phy->init = ulpi_init; | |
2d57a95f | 277 | |
298b083c | 278 | otg->phy = phy; |
13dd0c97 | 279 | otg->set_host = ulpi_set_host; |
2d57a95f DM |
280 | otg->set_vbus = ulpi_set_vbus; |
281 | ||
298b083c | 282 | return phy; |
2d57a95f DM |
283 | } |
284 | EXPORT_SYMBOL_GPL(otg_ulpi_create); | |
285 |